Currently on 6.1.3 with iPhone 4; cant jailbreak tethered now that signing has stopped?

I have a GSM iPhone 4 currently on 6.1.3; Am I correct in assuming that because apple has stopped signing 6.1.3/6.1.4, that I can no longer jailbreak this current firmware using sn0wbreeze/redsn0w? Or does this only apply to those who will be upgrading/downgrading to 6.1.3?

Before I attempted a jailbreak with it, I wanted to make sure I didn't get it stuck in a bad place. I've been out of the scene for a short bit and wasn't 100% clear on the signing issue.

To jailbreak you don't need to stitch anything. You will need a copy of 6.0 firmware for your phone though. To jailbreak you first point redsnow to that 6.0 firmware then go back to the jailbreak button and press that and follow the instructions. After that is done you will have to do it again, point redsnow again to 6.0 but then this time choose the boot tethered option after.

You will only need to stitch SHSH if you ever have to restore to 6.1.3 for any reason, iFaith can do the saving SHSH and stitching part all in one, just dont update your iTunes to 11.1 (it breaks stitched firmware restoring I believe).

Ya, normally you wouldn't need to point redsnow to any firmware but MuscleNerd hasn't updated it since 6.0 which is why even if you are on 6.1.3 you still have to "trick" redsnow that you are jailbreaking 6.0.